JP2010270469A - Flush toilet seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refractory flush toilet seat that can be constructed easily. <P>SOLUTION: The flush toilet seat includes a toilet seat body 10, a drain connecting member 20, and a shield member 30. The toilet seat body 10 has a toilet bowl 11 and a toilet seat drain pipe unit 12 connected to downstream side of the toilet bowl 11, an upper surface 13 formed consecutively on the upper end periphery of the toilet bowl 11, and a pedestal 14 which is formed to extend down from the upper surface 13 to encircle the toilet bowl 11 and the toilet seat drain pipe unit 12 and has a penetrating opening 15. The drain connecting member 20 is capable of connecting the downstream end opening 12C of the toilet seat drain pipe unit 12 located inside the pedestal 14 communicatively to the upper stream end opening 41 of a drain pipe 40. The shield member 30 blocks the opening 15 and is made of a refractory material. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a flush toilet bowl.

  Patent Document 1 discloses a conventional flush toilet. This flush toilet bowl has a ceramic toilet bowl body. The toilet body includes a toilet bowl portion that opens upward, a toilet drain pipe connected to the downstream side of the toilet bowl portion, an upper surface portion that is continuously formed at the upper edge of the toilet bowl portion, and a toilet bowl portion. And a pedestal portion formed so as to hang down from the upper surface portion so as to surround the toilet drainage pipe portion. An opening is formed in a pedestal formed at the rear of the toilet body. Also, this flush toilet is a resin drainage connection that allows communication between the downstream end opening of the toilet drainage pipe located in the pedestal and the upstream end opening of the drainage pipe drawn out to the toilet room where the toilet body is installed A member is provided.

  When constructing this flush toilet, first, the drain connection member is connected to the drain pipe and fixed to the floor surface. Next, while lowering the toilet body from above the drainage connection member, the toilet drainage pipe portion is connected to the drainage connection member, and the toilet body is fixed to the floor surface. Thus, when installing the toilet bowl body, the toilet drain pipe section and the drain pipe drawn into the toilet room can be easily communicated with each other via the drainage connecting member.

JP-A-2005-48407

  However, in the conventional flush toilet, the drainage connecting member made of resin is exposed from the opening of the pedestal, so that it is not a fire-resistant flush toilet.

  This invention is made | formed in view of the said conventional situation, Comprising: It is set as the problem which should be solved to provide the flush toilet bowl of the fireproof specification which can be constructed easily.

The flush toilet of the present invention is a toilet bowl part that opens upward, a toilet drain pipe part connected to the downstream side of the toilet bowl part, an upper surface part formed continuously on the upper edge of the toilet bowl part, A toilet body that is formed by hanging from the upper surface so as to surround the toilet bowl and the toilet drainage pipe, and has a pedestal part through which an opening is formed, and is formed of a noncombustible material;
A resin drainage connecting member capable of communicating between the downstream end opening of the toilet drainage pipe portion located in the pedestal portion and the upstream end opening of the drainage pipe drawn out to the toilet room where the toilet body is installed A flush toilet,
A shielding member made of a non-combustible material that closes the opening or surrounds the drainage connection member is provided.

  In this flush toilet, the resin drainage connection member is covered with the base part and the shielding member, which are non-combustible materials, by closing the opening part provided in the base part with the shielding member. Alternatively, the resin drainage connection member is surrounded by a shielding member that is a non-combustible material. For this reason, this flush toilet bowl can be made fireproof. Moreover, the lower end opening of the toilet drain pipe part and the upper end opening of the drain pipe drawn out to the toilet room can be easily communicated with each other by the drainage connecting member.

  Therefore, the flush toilet of the present invention can be easily constructed and can be fireproof.

  The drainage connection member has an outflow pipe portion whose downstream end opening is laterally open, extends in the lateral direction, and is connectable to the drainage pipe whose upstream end opening is laterally open. An insertion port is provided in the shielding member to be closed, and the drainage connection member or the drainage pipe can be inserted. In this case, it is possible to configure a fire-resistant flush toilet that can be connected to a drain pipe that extends laterally above the floor on which the flush toilet is installed.

  The shielding member may be attached to the drainage connection member. In this case, the shielding member can also be fixed to the floor surface by fixing the drainage connection member to the floor surface. For this reason, there is no need to separately fix only the shielding member to the floor or the like, and the flush toilet can be easily constructed.

The opening is formed by opening the lower part to the pedestal part formed at the rear part of the toilet body,
The shielding member that closes the opening is formed in a shape along the opening, and is provided on the left and right side surfaces and the upper surface of the outer peripheral surface, and is a soft material that is sandwiched between the opening when the opening is closed. It may have a first sealing member made of a non-combustible material.

  In this case, the first seal member made of a soft incombustible material is sandwiched between the shielding member and the opening by lowering the toilet body from above so that the opening is aligned with the shielding member. For this reason, the opening part of a base part and a shielding member can be joined by a 1st seal member without gap. Therefore, the resin drainage connecting member can be completely covered with the base member made of a noncombustible material and the shielding member provided with the first seal member. For this reason, the flush toilet bowl of a fireproof specification can be comprised.

The drainage connection member is inserted through the insertion port of the shielding member that closes the opening,
This shielding member is provided on the outer surface along the peripheral edge of the insertion port, and is connected to the end surface of the upstream end opening of the drain pipe when the outflow pipe portion is inserted and connected to the inside of the upstream end opening of the drain pipe. The second sealing member may be made of a soft noncombustible material sandwiched between them.

  In this case, the outer surface of the shielding member and the end surface of the upstream end opening of the drain pipe can be joined with a second seal member made of a non-combustible material without a gap. Since the drainage pipe has fire resistance such as a fireproof two-layer pipe, the drainage pipe part of the drainage connection member can be completely covered with the drainage pipe having fire resistance and the shielding member provided with the second seal member. it can. For this reason, the flush toilet bowl of a fireproof specification can be comprised.

  The second seal member may be formed wide. In this case, the end surface of the upstream end opening of the drain pipe and the outer surface of the shielding member can be joined to the drain pipes having different pipe diameters without any gap.

The drain pipe is inserted through the insertion port of the shielding member that closes the opening,
The shielding member may include a third seal member that is provided on the inner side surface and is made of a soft noncombustible material that is sandwiched between the outer peripheral surface of the peripheral portion of the opening when the opening is closed.

  In this case, it is possible to join the outer surface of the peripheral edge portion of the opening portion penetrating the pedestal portion and the shielding member with the third seal member without a gap. For this reason, the resin drainage connecting member can be completely covered with the base member made of a noncombustible material and the shielding member having the third seal member. Thus, a fire-resistant flush toilet bowl can be constructed.

It is sectional drawing of the flush toilet bowl of Example 1. FIG. It is a perspective view which shows the state by which the shielding member was attached to the drainage connection member of Example 1. FIG. FIG. 3 is a perspective view showing a construction procedure of Example 1. FIG. 3 is a perspective view showing a construction procedure of Example 1. It is a perspective view which shows the state by which the flush toilet bowl of Example 1 was constructed. It is a perspective view which shows the state by which the flush toilet bowl of Example 2 was constructed. It is a perspective view which shows the shielding member of Example 2. FIG. It is a perspective view which shows the shielding member of Example 2. FIG. It is a perspective view which shows the drainage connection member enclosed by the shielding member of Example 3. FIG. It is sectional drawing which shows the drainage connection member enclosed by the shielding member of Example 3.

  Embodiments 1 to 3 embodying the flush toilet of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 4, the flush toilet of Example 1 is attached to a ceramic toilet body 10, a resin drainage connection member 20, and a drainage connection member 20, and is formed of a noncombustible material. And a shielding member 30.

  The toilet body 10 has a toilet bowl 11 that opens upward. A toilet drain pipe 12 is connected to the downstream side of the toilet bowl 11. The toilet drain pipe part 12 is formed of a rising pipe part 12A rising from the lower opening 11A of the toilet bowl part 11 along the toilet bowl part 11, and a downward pipe part 12B descending from the upper end part of the rising pipe part 12A. Yes.

  In addition, an upper surface portion 13 is continuously formed on the upper edge of the toilet bowl 11. A pedestal 14 is suspended from the upper surface 13 so as to surround the toilet bowl 11 and the toilet drain pipe 12. A part of the outer side surface of the descending pipe portion 12 </ b> B of the toilet drainage pipe portion 12 is located behind and exposed from the pedestal portion 14. The downstream end opening 12C of the toilet drain pipe portion 12 is located in the pedestal portion 14 and opens downward.

  The pedestal portion 14 formed at the rear portion of the toilet body 10 has a protruding portion 14T that extends rearward and forms a left and right wall portion and an upper wall portion. The rear end portion of the projecting portion 14T is open and forms an opening portion 15 that opens downward. The opening 15 is formed in a substantially vertically long rectangular shape when viewed from the rear of the toilet body 10.

  On the upper surface of the rear end of the toilet body 10, an inlet M <b> 1 of a rim supply pipe S <b> 1 that supplies cleaning water to a rim water passage R formed at an upper peripheral edge of the toilet bowl 11, and a lower end of the toilet drain pipe 12. An inflow port M2 of a jet supply pipe S2 for supplying cleaning water to a jet nozzle J attached to is attached by a mounting plate T. Each inflow port M1, M2 is connected to a wash water supply source and is connected to a water supply pipe to which an on-off valve V is connected.

  A drain pipe 40 is drawn out from the wall surface W of the toilet room L where the toilet body 10 is installed. The drain pipe 40 is a fireproof double-layer pipe, extends in the lateral direction from the wall surface W, and its upstream end opening 41 opens in the lateral direction.

  As shown in FIGS. 1 and 2, the resin drainage connecting member 20 includes a downstream end opening 12 </ b> C of the toilet drainage pipe portion 12, a connecting pipe portion 21 that communicates with an upstream end opening 41 of the drainage pipe 40, and a connecting pipe. It is formed from a fixing portion 22 that fixes the portion 21 to the floor surface F.

  The connecting pipe section 21 has an inflow pipe section 21A that opens upward, an outflow pipe section 21B that opens in the lateral direction, and a curved connection pipe section 21C that connects the inflow pipe section 21A and the outflow pipe section 21B. is doing. A packing 25 is fitted on the inflow pipe portion 21A. The packing 25 is formed of a body portion 25A and a flange portion 25B that extends inwardly from the end edge of the body portion 25A and forms an opening smaller than the inner diameter of the inflow pipe portion 21A. A packing 26 is fitted on the outflow pipe portion 21B. The packing 26 is formed of a body portion 26A and a flange portion 26B that extends inward from the end edge of the body portion 26A and forms the same opening as the inner diameter of the outflow pipe portion 21B. A cylindrical leg portion 21D extending downward is formed on the lower end outer surface of the bending tube portion 21C.

  The fixing portion 22 is formed in a flat plate shape, and a leg portion 21D of the connection pipe portion 21 is inserted in the center portion, and a cylindrical support portion 22A that supports the connection pipe portion 21 is erected. A screw groove is formed on the outer surface of the upper end portion of the support portion 22A. The fixing portion 22 can be screwed into the screw groove, and has a tightening member 23 having an opening into which the leg portion 21D can be inserted at the center portion. An elastic member 24 is fitted between the upper end surface of the support portion 22A, the upper inner surface of the tightening member 23, and the outer peripheral surface of the leg portion 21. As the tightening member 23 is screwed into the support portion 22 </ b> A, the elastic member 24 is deformed, the leg portion 21 </ b> D is prevented from coming off by the frictional force, and the connecting pipe portion 21 is connected to the fixing portion 22.

  The rear end edge of the fixing portion 22 is formed to extend linearly in the left-right direction, and screw holes H1 for fixing the drainage connecting member 20 to the floor surface F are penetrated at both ends. Further, the front end portion of the fixing portion 22 is formed in a shape with a center pointed forward, and a screw hole H1 for fixing the drainage connection member 20 to the floor surface F is also provided through this front end portion. Yes.

  The shielding member 30 has a shielding member main body 31 formed of a stainless steel plate material. The outer shape of the shielding member main body 31 is formed in a substantially vertical rectangular shape similar to the shape of the opening 15 formed in the pedestal portion 14 of the toilet main body 10, that is, the shape of the opening 15. The left and right end portions and the upper end portion of the shielding member main body 31 are bent forward to form left and right side surfaces and an upper surface having a predetermined width. A first seal member 32 made of glass wool, which is a soft noncombustible material, is attached to the left and right side surfaces and the upper surface of the shielding member body 31. Further, a hook-shaped attachment portion 31 </ b> B extending rearward is formed at the lower end portion of the shielding member main body 31. The first seal member 32 has an extending portion 32A that extends in the left-right direction and the upper surface of the attachment portion 31B at the lower ends of the left and right side surfaces of the shielding member 31.

  An insertion port 31 </ b> A is provided in the shielding member main body 31. The shielding member 30 is attached to the drainage connection member 20 in a state where the connection pipe portion 21 of the drainage connection member 20 is inserted through the insertion port 31A. That is, the drainage connection member 20 is inserted into the insertion port 31A of the shield member 30 from the outflow pipe portion 21B side of the drainage connection member 20, and the attachment portion 31B of the shield member main body 31 on the rear end upper surface of the fixing portion 22 of the drainage connection member 20 Is placed. The shielding member 30 is attached to the drainage connection member 20 by a screw B inserted through the opening provided in the attachment portion 31 </ b> B and screwed into the fixing portion 22. For this reason, the trouble of fixing only the shielding member 30 separately to the floor surface or the like is eliminated, and the flush toilet can be easily constructed.

  A second sealing member 34 made of glass wool, which is a soft noncombustible material, is formed on the outer surface of the shielding member main body 31 on the side where the outflow pipe portion 21B of the drainage connection member 20 protrudes along the peripheral edge portion of the insertion port 31A. Is attached in a ring shape.

  The construction procedure of the flush toilet of Example 1 configured in this way will be described.

  First, as shown in FIG. 3, the drainage connection member 20 to which the shielding member 30 is attached is moved, and the packing 26 is externally fitted in the upstream end opening 41 of the drainage pipe 40 that extends laterally above the floor surface F. The outflow pipe portion 21B is inserted. Thereby, the drainage pipe 40 and the drainage connection member 20 are communicated in a watertight manner by the packing 26. At this time, the second seal member 34 attached to the outer surface of the shielding member body 31 is sandwiched between the end surface of the upstream end opening 41 of the drain pipe 40. Thereby, the outer surface of the shielding member 30 and the end surface of the upstream end opening 41 of the drain pipe 40 can be joined without a gap. Since the drain pipe 40 is a fireproof double-layer pipe, the outflow pipe portion 21B of the drain connection member 20 can be completely covered with the drain pipe 40 having fire resistance and the shielding member 30 to which the second seal member 34 is attached. it can. For this reason, the flush toilet bowl of a fireproof specification can be comprised.

  Thereafter, the screws B1 and B2 are inserted into the screw holes H1 provided in the fixing portion 22 of the drainage connection member 20 and screwed into the floor surface F. In this manner, the drainage connection member 20 is fixed to the floor surface F in a state where it is connected to the drainage pipe 40. Thereby, the shielding member 30 is also fixed to the floor surface F. For this reason, there is no trouble of fixing only the shielding member 30 to the floor surface or the like, and the flush toilet can be easily constructed.

  The screw B2 inserted through the screw hole H1 penetrating the left and right rear end edges of the fixing portion 22 and screwed into the floor surface F integrally forms a screw portion extending upward from the upper surface of the head. It is used when the toilet body 10 is fixed to the floor F as will be described later.

  Next, as shown in FIG. 4, the lower end portion of the descending pipe portion 12 </ b> B of the toilet drainage pipe portion 12 is inserted into the inflow pipe portion 21 </ b> A of the drainage connection member 20 and formed on the pedestal portion 14 with respect to the shielding member 30. The toilet body 10 is lowered from above the drainage connection member 20 so that the opening 15 is aligned. At this time, a threaded portion formed at the upper portion of the screw B2 that fixes the drainage connecting member 20 to the floor surface F is inserted into the fixing hole H2 that is provided through the rear left and right rear portions of the toilet body 10. In this way, as shown in FIG. 5, the toilet body 10 is placed on the floor surface F, the washer Z is inserted into the screw portion of the screw B, and the nut N is tightened. Fixed to.

  Thereby, as shown in FIG. 1, the lower end portion of the descending pipe portion 12 </ b> B is inserted into the inflow pipe portion 21 </ b> A so as to spread the flange portion 25 </ b> B of the packing 25 fitted on the inflow pipe portion 21 </ b> A. For this reason, the toilet drainage pipe part 12 and the drainage connection member 20 are communicated in a watertight manner. At this time, the first seal member 32 attached to the left and right side surfaces and the upper surface of the shielding member body 31 is sandwiched between the shielding member body 31 and the opening 15. Thereby, the shielding member 30 and the opening part 15 can be joined without gap. For this reason, the drainage connection member 20 can be completely covered by the ceramic base 14 and the shielding member 30 to which the first seal member 32 is attached. For this reason, the flush toilet bowl of a fireproof specification can be comprised.

  Therefore, the flush toilet of Example 1 can be easily constructed and can be fireproof.

  As shown in FIG. 6, the flush toilet according to the second embodiment includes a shielding member 50 in which the drain pipe 40 is inserted through the insertion port 51 </ b> A provided therethrough and covers the opening 15 of the toilet body 10. . About another structure, it is the same as that of Example 1, About the same structure, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIGS. 7 and 8, the shielding member 50 has a shielding member body 51 formed of a stainless steel plate. The left and right ends and the upper end of the shielding member body 51 are bent forward. The left and right side surfaces 51S and the upper surface 51U are formed. The left and right side surfaces 51S and the upper surface 51U are formed so as to overlap the outer peripheral surface of the protruding portion 14T of the pedestal portion 14 formed at the rear portion of the toilet body 10. A notch 51K is provided at the lower end of the left and right side surfaces 51S. When the shielding member 50 is attached to the notch 51K so as to close the opening 15, the lower rear edge of the toilet body 10 is inserted. An insertion port 51 </ b> S is provided in the shielding member main body 51. A third sealing member 52 made of glass wool, which is a soft noncombustible material, is attached to the inner side surface of the shielding member 51.

  The construction procedure of the flush toilet of Example 2 configured as described above will be described.

  First, the insertion port 51 </ b> S of the shielding member 50 is inserted into the drain pipe 40 that extends laterally above the floor surface F. In this state, the drain pipe 40 and the drain connection member 20 are connected, and the drain connection member 20 is fixed to the floor surface F. Next, the toilet body 10 is lowered from above the drainage connection member 20, the drainage connection member 20 and the toilet drainage pipe portion 12 of the toilet body 10 are connected, and the toilet body 10 is fixed to the floor F. Next, the shielding member 50 is moved so that the left and right side surfaces 51 </ b> S and the upper surface 51 </ b> U of the shielding member 50 overlap the outer peripheral surface of the protruding portion 14 </ b> T of the pedestal portion 14 formed at the rear portion of the toilet body 10, thereby closing the opening 15. At this time, the third seal member 52 adhered to the inner surface of the shielding member 50 is sandwiched between the shielding member main body 51 and the outer surface of the peripheral edge of the opening 15. Thereby, the shielding member 50 and the outer surface of the peripheral part of the opening part 15 can be joined without a gap. For this reason, the drainage connection member 20 can be completely covered with the ceramic pedestal portion 14 and the shielding member 50 to which the third seal member 52 is attached. For this reason, the flush toilet bowl of a fireproof specification can be comprised.

  Therefore, the flush toilet of Example 2 can also be easily constructed and can be fireproof.

  As shown in FIGS. 9 and 10, the flush toilet of Example 3 includes a stainless shielding member 60 that surrounds the connecting pipe portion 21 of the resin drainage connecting member 20. About another structure, it is the same as that of Example 1 etc., About the same structure, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The shielding member 60 accommodates the connecting pipe portion 21 therein, and is formed by joining the outer peripheral side surface below the intermediate portion of the inflow pipe portion 21A and the outer peripheral side surface of the outflow pipe portion 21B. Further, an opening is provided in the lower end portion of the shielding member 60, and the leg portion 21D is inserted therethrough. The leg portion 21D is connected to the fixing portion 22, and the drainage connecting member 20 having the connecting pipe portion 21 surrounded by the shielding member 60 can be fixed to the floor surface.

  The construction procedure of the flush toilet of Example 3 configured as described above will be described.

  First, the drainage connection member 20 surrounded by the shielding member 60 is connected to a drainage pipe that extends laterally above the floor surface F, and the drainage connection member 20 is fixed to the floor surface. Next, the toilet body 10 is lowered from above the drainage connection member 20, the drainage connection member 20 and the toilet drainage pipe 12 of the toilet body are connected, and the toilet body is fixed to the floor F. Even if an opening is provided in the pedestal portion of the toilet body, since the drainage connection member 20 is surrounded by the shielding member 60, a fire-resistant flush toilet bowl can be configured.

  Therefore, the flush toilet of Example 3 can also be easily constructed and can be fireproof.

The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In Examples 1 to 3, the downstream end opening of the drainage connection member is opened in the lateral direction, but may be opened downward. In this case, it can be connected to a drain pipe that is drawn out from the floor and whose upstream end opening is opened upward.
(2) In Example 1, the shielding member is attached to the drainage connection member and fixed to the floor surface. However, the shielding member may be separately fixed to the floor surface or the like without being attached to the drainage connection member.
(3) In Examples 1 to 3, the sealing member is made of glass wool, but may be made of rock wool, ceramic wool or the like.
(4) In Examples 1 to 3, the drainage connection member is connected to the fireproof double-layer pipe, but the drainage connection member can also be connected to the steel pipe.
(5) In Examples 1 to 3, the shielding member is made of stainless steel, but other metallic properties such as iron, ceramics, and concrete may be used.
(6) In Examples 1 to 3, the drainage connection member is directly connected to the drainage pipe, but may be connected via an adapter. In this case, the drainage connection member and the drainage pipe can be connected even when the drainage connection member and the drainage pipe are misaligned or the pipe diameter of the drainage connection member and the pipe diameter of the drainage pipe are different.

DESCRIPTION OF SYMBOLS 10 ... Toilet body 11 ... Toilet bowl part 12 ... Toilet drain pipe part 13 ... Upper surface part 14 ... Base part 15 ... Opening part 12C ... Downstream end opening (of the toilet drain pipe part) 20 ... Drain connection member 21B ... Outflow pipe part 30 , 50, 60 ... shielding members 31A, 51A ... insertion port 32 ... first seal member 34 ... second seal member 40 ... drain pipe 41 ... upstream end opening (of drain pipe) 52 ... third seal member L ... toilet room

Claims (6)

A toilet bowl part that opens upward, a toilet drainage pipe connected to the downstream side of the toilet bowl part, an upper surface part formed continuously at the upper periphery of the toilet bowl part, a toilet bowl part, and a toilet drainage pipe part A toilet body that is formed by hanging from the upper surface so as to surround the base, and has a pedestal portion through which an opening is formed, and is formed of a non-combustible material,
A resin drainage connecting member capable of communicating between the downstream end opening of the toilet drainage pipe portion located in the pedestal portion and the upstream end opening of the drainage pipe drawn out to the toilet room where the toilet body is installed A flush toilet,
A flush toilet comprising a shielding member made of a noncombustible material that closes the opening or surrounds the drainage connection member.   The drainage connection member has an outflow pipe portion whose downstream end opening is laterally open, extends in the lateral direction, and is connectable to the drainage pipe whose upstream end opening is laterally open. The flush toilet according to claim 1, wherein an insertion port is provided in the shielding member to be closed, and a drainage connecting member or a drain pipe can be inserted.   The flush toilet according to claim 1 or 2, wherein the shielding member is attached to the drainage connection member. The opening is formed by opening the lower part to the pedestal part formed at the rear part of the toilet body,
The shielding member that closes the opening is formed in a shape along the opening, and is provided on the left and right side surfaces and the upper surface of the outer peripheral surface, and is a soft material that is sandwiched between the opening when the opening is closed. The flush toilet according to any one of claims 1 to 3, further comprising a first sealing member made of a non-combustible material. The drainage connection member is inserted through the insertion port of the shielding member that closes the opening,
This shielding member is provided on the outer surface along the peripheral edge of the insertion port, and is connected to the end surface of the upstream end opening of the drain pipe when the outflow pipe portion is inserted and connected to the inside of the upstream end opening of the drain pipe. The flush toilet according to any one of claims 2 to 4, further comprising a second seal member made of a soft noncombustible material sandwiched between the two. The drain pipe is inserted through the insertion port of the shielding member that closes the opening,
The shielding member has a third seal member made of a soft noncombustible material that is provided on the inner surface and is sandwiched between the outer surface of the peripheral edge of the opening when the opening is closed. The flush toilet bowl according to claim 2.

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